This name is a synonym of Calliergon richardsonii (Mitt.) Kindb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 35177092) with original publication details: J. Proc. Linn. Soc., Bot. 8: 42 1864.
This name was in version 1 of The Plant List, record tro-35177092.